sed command with -i option failing on Mac, but works on Linux

Question

I\'ve successfully used the following sed command to search/replace text in Linux:

sed -i \'s/old_link/new_link/g\' *

However,

Answer 1

Here's how to apply environment variables to template file (no backup need).

1. Create template with {{FOO}} for later replace.

echo "Hello {{FOO}}" > foo.conf.tmpl

2. Replace {{FOO}} with FOO variable and output to new foo.conf file

FOO="world" && sed -e "s/{{FOO}}/$FOO/g" foo.conf.tmpl > foo.conf

Working both macOS 10.12.4 and Ubuntu 14.04.5